Optical and microphysical parameters of the aerosol in the smoky atmosphere of the Moscow region in 2010

513 According to the data of ecological monitoring in the city of Moscow and Moscow region, it was found that during the period of the smoky atmosphere in the summer of 2010, the mass concentration of the smoke aerosol with the diameter of particles less than 10 μm (PM10) reached extreme values for Moscow, 1.6– 1.7 mg/m 3 . According to the measurements at the Meteorological Observatory of the Moscow State University (MO MSU) and in the Moscow region at the Zvenigorod Scientific Station of the Oboukhov Institute of Atmospheric Physics, Russian Academy of Sciences (ZSS IAP), based on the data of sun photom� eters CIMEL, which are included in the global moni� toring network in the atmosphere column AERONET, the maximum values of the optical aerosol thickness at a wavelength of 500 nm during the peatbog forest fires exceeded 4.5. Analysis of the spectropolarimetric measurements demonstrated that the optical charac� teristics of the studied smoke in the surface layer have a significant difference from the optical characteristics of the smoke from the forest and peatbog fires in 2002 [1, 2]. The microphysical properties of the smoke in 2002 retrieved from the data of optical characteristic measurements are also notably different from the microphysical characteristics observed previously, including the smoke in 2002 in the Moscow region. In 2010, during the period of the intensive smoky atmo� sphere, the distribution function for the aerosol parti� cles appeared very narrow and the major part of the volume (mass) of the aerosol smoke particles belonged to the submicrometer range. ,